Index: .fossil-settings/ignore-glob
==================================================================
--- .fossil-settings/ignore-glob
+++ .fossil-settings/ignore-glob
@@ -1,9 +1,10 @@
 .tmp
 Makefile
 aclocal.m4
 autom4te.cache
+build/work
 config.guess
 config.log
 config.status
 config.sub
 configure

Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -15,10 +15,12 @@
 tclpkcs11.o: $(srcdir)/tclpkcs11.c $(srcdir)/pkcs11.h $(srcdir)/pkcs11f.h $(srcdir)/pkcs11t.h
 	$(CC) $(CPPFLAGS) $(CFLAGS) -o tclpkcs11.o -c $(srcdir)/tclpkcs11.c
 
 tclpkcs11.@SHOBJEXT@: tclpkcs11.o
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(SHOBJLDFLAGS) -o tclpkcs11.@SHOBJEXT@ tclpkcs11.o $(LIBS)
+	-@WEAKENSYMS@ @EXTENSION_TARGET@
+	-@REMOVESYMS@ @EXTENSION_TARGET@
 
 install: tclpkcs11.@SHOBJEXT@ pkgIndex.tcl
 	$(INSTALL) -d "$(DESTDIR)$(PACKAGE_INSTALL_DIR)"
 	$(INSTALL) -m 0644 pkgIndex.tcl "$(DESTDIR)$(PACKAGE_INSTALL_DIR)"
 	$(INSTALL) -m 0755 tclpkcs11.@SHOBJEXT@ "$(DESTDIR)$(PACKAGE_INSTALL_DIR)"

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -9,11 +9,25 @@
 
 dnl Determine system information
 DC_CHK_OS_INFO
 
 dnl Determine how to make shared objects
-DC_GET_SHOBJFLAGS
+if test "$TCLEXT_BUILD" != 'static'; then
+	dnl Determine how to make shared objects
+	DC_GET_SHOBJFLAGS
+
+	EXTENSION_TARGET="tclpkcs11.${SHOBJEXT}"
+else
+	dnl Hard-code the archive extension to be .a
+	AREXT='a'
+	AC_CHECK_TOOL([AR], [ar], [false])
+	AC_CHECK_TOOL([RANLIB], [ranlib], [:])
+
+	EXTENSION_TARGET="tclpkcs11.${AREXT}"
+fi
+AC_SUBST(EXTENSION_TARGET)
+AC_SUBST(TCLEXT_BUILD)
 
 dnl Find out if we have the functions needed to open shared objects
 AC_SEARCH_LIBS(dlopen, dl,, [
 	AC_SEARCH_LIBS(shl_load, dld dl)
 ])
@@ -23,7 +37,10 @@
 AC_CHECK_HEADERS(unistd.h stdlib.h string.h strings.h dlfcn.h dl.h)
 
 dnl Perform Tcl Extension required stuff
 TCLEXT_INIT
 
+dnl Setup a stable ABI
+DC_SETUP_STABLE_API([${srcdir}/tclpkcs11.vers], tclpkcs11.syms)
+
 dnl Produce output
-AC_OUTPUT(Makefile pkgIndex.tcl)
+AC_OUTPUT(Makefile pkgIndex.tcl tclpkcs11.syms)

ADDED   tclpkcs11.syms.in
Index: tclpkcs11.syms.in
==================================================================
--- /dev/null
+++ tclpkcs11.syms.in
@@ -0,0 +1,1 @@
+@SYMPREFIX@Tclpkcs11_Init

ADDED   tclpkcs11.vers
Index: tclpkcs11.vers
==================================================================
--- /dev/null
+++ tclpkcs11.vers
@@ -0,0 +1,6 @@
+{
+	global:
+		Tclpkcs11_Init;
+	local:
+		*;
+};